[CR] I have chain hang-ups, doctor. Please help me.

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From: <Stronglight49@aol.com>
Date: Sat, 1 Sep 2007 02:26:06 EDT
Subject: [CR] I have chain hang-ups, doctor. Please help me.
To: classicrendezvous@bikelist.org


I've noticed recently that a new SRAM PC-58 chain tends to "Hang" - riding atop the cogs of an old Maillard compact 6-speed freewheel. These cogs featured the familiar symmetrical "notch-top" teeth designed to help lift up a chain. Maybe not too helpful a design, but they nevertheless had been produced for many years. So, I thought I had just suddenly begun shifting very sloppy.

However, examining the chain and freewheel carefully, I noticed that the chain's outer plates are actually tapered considerably. This creates a clean knife-blade like fit into the teeth of the cogs. This was not an issue on the old Sedis chain which I replaced - which had side plates which were not beveled, and it is not an issue with old Regina Oro or Corsa chains which have just flat side plates.

I love the Sram 8-speed chains which I now use on most bikes - even with 5-speed freewheels... but, definitely not with these cogs. So, can someone please recommend a good modern chain to use on this style of freewheel?

Thanks! Bob Hanson, Albuquerque, NM, USA

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